CN109725462B - Display device, display apparatus, and driving method of display device - Google Patents
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Abstract
The application discloses a display device, a display apparatus, and a driving method of the display device. The display device includes: a polarized point light source array including a plurality of first polarized point light sources and a plurality of second polarized point light sources; the liquid crystal display panel comprises a first sub-pixel group corresponding to the first polarized point light source and a second sub-pixel group corresponding to the second polarized point light source, wherein the first sub-pixel group is used for constructing a three-dimensional image with a first depth value, and the second sub-pixel group is used for constructing a three-dimensional image with a second depth value. According to the technical scheme of the embodiment of the application, the three-dimensional virtual images with different depth values are realized through the polarized point light source array and the liquid crystal panel, and the adjustable range of the virtual three-dimensional light field object is increased.
Description
Technical Field
The present application relates generally to the field of display technology, and more particularly, to a display device, a display apparatus, and a driving method of the display device.
Background
Augmented Reality (AR) technology not only displays real world information, but also displays virtual information at the same time, and the two kinds of information are mutually supplemented and superposed. For example, the real world can be seen surrounding the virtual image by multiply combining the real world with the virtual image using AR glasses.
However, in the existing AR glasses, in a specific application scene, an observer can only see an AR image at a fixed position. When the observer views the AR image far from the real object, both the real object and the AR image presented through the display panel may be blurred, which is mainly caused by the fact that the AR glasses cannot be zoomed in a dynamic range, so that the focus position of the imaging thereof is not consistent with the focus position of the eyes, thereby causing the AR image to be blurred.
Disclosure of Invention
In view of the above-mentioned drawbacks or shortcomings in the prior art, it is desirable to provide a display device, an apparatus, and a driving method of the display device to improve adaptability of a virtual image to a real scene.
In a first aspect, an embodiment of the present application provides a display device, including:
a polarized point light source array including a plurality of first polarized point light sources and a plurality of second polarized point light sources;
the liquid crystal display panel comprises a first sub-pixel group corresponding to the first polarized point light source and a second sub-pixel group corresponding to the second polarized point light source, wherein the first sub-pixel group is used for constructing a three-dimensional image with a first depth value, and the second sub-pixel group is used for constructing a three-dimensional image with a second depth value.
Optionally, the array of polarized point light sources comprises:
the lateral light source comprises a first light source and a second light source;
the light guide plate is positioned between the first light source and the second light source and comprises a plurality of first light guide points and a plurality of second light guide points which are distributed at intervals on the light incident side of the light guide plate;
sequentially arranging a first polarizing film and a second polarizing film on a light-emitting side of the light guide plate, wherein the first polarizing film comprises a plurality of first polarizing regions, and the second polarizing film comprises a plurality of second polarizing regions;
the orthographic projection of the first polarization area and the second light guide point on the liquid crystal panel is superposed, and the orthographic projection of the second polarization area and the first light guide point on the liquid crystal panel is superposed; the light transmitted from the second polarization region constitutes a first polarization point light source, and the light transmitted from the first polarization region constitutes a second polarization point light source.
Optionally, the display device further comprises:
the first polarization region is disposed on the first polarizing film on a side opposite to the second polarizing film;
the second polarizing region is disposed on a side of the second polarizing film opposite to the first polarizing film.
Optionally, the display device further comprises:
and arranging a polarizer on the side of the liquid crystal panel far away from the second polarizing film.
Optionally, the first and second light sources are light emitting diodes.
In a second aspect, embodiments of the present application provide a head-mounted display device including the display device as described in the first aspect.
In a third aspect, an embodiment of the present application provides a driving method of a display device, where the display device is the display device described in the first aspect, and the method includes:
responding to the time sequence control signal, and driving and controlling the first light source and the second light source to work alternately;
when the first light source is controlled to be in an on state at a first moment, driving a second polarization area corresponding to the first light source to be in a polarization modulation on state, and driving the first polarization area to be in a polarization modulation off state;
and responding to the second polarization area in a polarization modulation starting state, and controlling a first sub-pixel group corresponding to the first polarization point light source on the liquid crystal panel to construct a three-dimensional image with a first depth value.
Optionally, the method further comprises:
when the second light source is controlled to be in an on state at the second moment, driving a first polarization region corresponding to the second light source to be in a polarization modulation on state, and driving a second polarization region to be in a polarization modulation off state;
and responding to the first polarization area in the polarization modulation starting state, and controlling a second sub-pixel group corresponding to the second polarization point light source on the liquid crystal panel to construct a three-dimensional image with a second depth value.
The method and the device for reconstructing the three-dimensional virtual image realize the reconstruction of the three-dimensional virtual image with different depth values through the combination of the polarization point light source array and the liquid crystal panel, and can simultaneously obtain the clear three-dimensional virtual image when the three-dimensional virtual image is fused with real scenes with different position distances.
Further, the array of polarized point light sources also allows products containing the display device to achieve brightness enhancement when used outdoors.
Further, the polarization regions of the polarized point light source array are oppositely arranged to reduce the thickness of the screen.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a display device provided in an embodiment of the present application;
fig. 2 shows a schematic structural diagram of a polarized point light source array 101 provided in an embodiment of the present application;
fig. 3 is a schematic diagram illustrating a structural principle of a display device provided by an embodiment of the present application;
fig. 4 is a schematic flowchart illustrating a driving method of a display device according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant disclosure and are not limiting of the disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
When an observer observes an observation object of a real environment through a display device of a display apparatus, ambient light passes through a display device of the related art, and the display device employs a fixed optical device, the observer needs to see a cleaned augmented reality image (i.e., an AR image) at a fixed position. When an observer wearing the augmented reality device changes his/her own position within a dynamic range, for example, when the observer is far away from a real observation object, the focus position of human eyes is inconsistent with the focus position imaged by the augmented reality device, so that both the observation object and the AR image seen by the human eyes become blurred, and the AR light field display effect is poor.
The present disclosure provides a display device, which is expected to effectively improve the definition of fusion between a real scene and an AR image within a scene range, and improve the AR light field display effect.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
As shown in fig. 1, the display device includes:
a polarized point light source array 101 including a plurality of first polarized point light sources 101a and a plurality of second polarized point light sources 101b;
the liquid crystal panel 102 is disposed on the light exit side of the polarized point light source array, and the liquid crystal panel 102 includes a first sub-pixel group 102a corresponding to the first polarized point light source and a second sub-pixel group 102b corresponding to the second polarized point light source. The first sub-pixel group 102a is used for constructing a three-dimensional image 103 having a first depth value and the second sub-pixel group 102b is used for constructing a three-dimensional image 104 having a second depth value.
The polarization point light source array in the embodiment of the present application may be implemented by two polarization films oppositely disposed, and the number of the polarization plates may be reduced by the polarization films, so as to reduce the height of the display device. The first polarizing film is provided with a first polarizing region (or referred to as a first polarization), and the second polarizing film is provided with a second polarizing region (or referred to as a second polarization). Preferably, the first polarization region is disposed on a side of the first polarization film opposite to the second polarization film; the second polarizing region is disposed on a side of the second polarizing film opposite to the first polarizing film. The vertical space can be further compressed by this oppositely arranged structure, reducing the height of the display device.
Further, the polarizer 105 may be provided only on the side of the liquid crystal panel away from the second polarizing film.
According to the embodiment of the application, incident light is modulated by combining the liquid crystal panel, different displayed gray scales are realized, and the transmittance of ambient light is increased by removing a polaroid, so that the brightness of a display device and the definition of a three-dimensional image are improved.
The display device provided by the embodiment of the application improves the depth value range of a space three-dimensional light field by introducing the polarized point light source array and the liquid crystal panel arranged on the light emitting side of the polarized point light source array, so that an AR image can obtain a clear image in a larger depth range.
Fig. 2 shows a schematic structural diagram of the polarization point light source array 101 provided in the embodiment of the present application.
As shown in fig. 2, the polarization point light source array 101 includes:
a first light source 201 and a second light source 202 of the side entry type.
A light guide plate 203, which is located between the first light source and the second light source, and includes a plurality of first light guide points 203a and a plurality of second light guide points 203b that are distributed at intervals on the light incident side of the light guide plate;
a first polarizing film 204 and a second polarizing film 205 are disposed in this order on the light exit side of the light guide plate 203. Wherein first polarizing film 204 includes a plurality of first polarizing regions 204a and second polarizing film 205 includes a plurality of second polarizing regions 205a.
The first polarization region 204a and the second light guide point are overlapped in the orthographic projection of the liquid crystal panel. The second polarization region 205a coincides with the orthographic projection of the first light guide point on the liquid crystal panel. The light transmitted from the second polarization region 205a constitutes a first polarization point light source, and the light transmitted from the first polarization region 204a constitutes a second polarization point light source.
In the embodiment of the present invention, the liquid crystal panel 102 and the polarizer are disposed on the light emitting side of the polarized point light source array 101. Wherein the first and second light sources may be light emitting diodes.
The polarizing film and the polarizer are not limited in material.
According to the embodiment of the application, the depth value range of the three-dimensional scene is increased by improving the structure of the display device, so that a viewer can obtain a clear fused image in a wider range.
The display device can be applied to a head-mounted display device. The term "head-mounted display device" refers, among other things, to wearable devices having the ability to present computer-generated information (such as images and/or video) to a user, as well as the ability to allow the user to see through it. Head mounted display devices are used to present virtual objects to a user while also giving the user the ability to see a scene of the real world. Which includes one or both lenses placed in front of the user's eyes and containing a translucent physical display device in the lens that presents computer-generated information to the user. Such as a Liquid Crystal Display (LCD), an LED Display (LED), an OLED Display (Organic Light-Emitting Diode, OLED), and so on.
The head mounted display device may be worn on the user's head or as part of a helmet worn by the user. For example, the glasses may be AR glasses, either monocular or binocular.
In the embodiment of the present application, an observer views a real observation object for further explanation, please refer to fig. 3, and fig. 3 shows a schematic structural principle diagram of a display device provided in the embodiment of the present application.
As shown in fig. 3, when the first light source 201 is in the on state, the incident light transmits the light of the first light source 201 to the liquid crystal panel 102 through the plurality of first light guide points 203a of the light guide plate 203 via the second polarization region 205a of the second polarization film 205 to form a light spot, and the first sub-pixel group 102a on the liquid crystal panel separates the images of the left and right eyes by partial shielding, thereby implementing a three-dimensional display effect. The three-dimensional image 103 formed at this time is reconstructed by the first depth plane constituted by the first sub-pixel group.
When the second light source 201 is in an on state, the incident light transmits the light of the second light source 202 to the liquid crystal panel 102 through the plurality of second light guide points 203b of the light guide plate 203 via the first polarization region 204a of the first polarization film 204 to form a light spot, and the second sub-pixel group 102b on the liquid crystal panel separates the images of the left and right eyes by partial shielding, thereby realizing a three-dimensional display effect. The three-dimensional image 104 formed at this time is reconstructed by the second depth plane constituted by the second sub-pixel group.
In order to realize the depth value range adjustment of the three-dimensional light field proposed by the present application, an embodiment of the present application further provides a driving method of a display device described based on the above embodiment. Referring to fig. 4, fig. 4 is a schematic flow chart illustrating a driving method of a display device according to an embodiment of the present disclosure.
And step 401, responding to the timing control signal, and driving and controlling the first light source and the second light source to work alternately.
Step 403, in response to that the second polarization area is in the polarization modulation on state, controlling a first sub-pixel group corresponding to the first polarization point light source on the liquid crystal panel to construct a three-dimensional image with a first depth value.
Assuming the display device as described in fig. 3, the first light source 201 and the second light source 202 drive the first light source 201 in an on state at a first time in response to the timing control signal, and control the second polarization region on the second polarization film in a polarization modulation on state in response to the on state of the first light source 201, while controlling the first polarization region on the first polarization film in a polarization modulation off state. At this time, the light of the observation object in the real environment is projected onto the liquid crystal panel 102 through the second polarization region, and the corresponding first sub-pixel group reconstructs the three-dimensional image 103 on the corresponding depth value plane in the conventional manner.
The second light source 202 is driven in an on state at a second time, and in response to the on state of the second light source, the first polarization region on the first polarizing film is controlled to be in a polarization modulation on state while the second polarization region on the second polarizing film is controlled to be in a polarization modulation off state. At this time, the light of the observation object in the real environment is transmitted to the liquid crystal panel 102 through the first polarization region, and the corresponding second sub-pixel group reconstructs the three-dimensional image 104 on the corresponding depth value plane in the conventional manner.
This application embodiment, through first light source of sequential control signal alternate control and second light source, make the sub-pixel region on the liquid crystal display panel be injectd respectively in the illumination zone of the pointolite that is polarized by the corresponding, can make the observer in the scene apart from the different distance of true observed object, can obtain bigger depth of field scope, thereby obtain more clear AR image, and simultaneously, the double-deck polarization pointolite array of this application can promote the display brightness of augmented reality equipment effectively through two light sources.
It should be noted that while the operations of the disclosed methods are depicted in the drawings in a particular order, this does not require or imply that these operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results. Rather, the steps depicted in the flowcharts may change the order of execution. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.
It should be understood that the operations and features described above for the method are equally applicable to the apparatus and the units comprised therein and will not be described in detail here.
The division into modules or units, as referred to herein, is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other combinations of features described above or their equivalents without departing from the spirit of the disclosure. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (7)
1. A display device for AR display, comprising:
a polarized point light source array including a plurality of first polarized point light sources and a plurality of second polarized point light sources;
arranging a liquid crystal panel on the light outgoing side of the polarized point light source array, wherein the liquid crystal panel comprises a first sub-pixel group corresponding to the first polarized point light source and a second sub-pixel group corresponding to the second polarized point light source, the first sub-pixel group is used for constructing a three-dimensional image with a first depth value, and the second sub-pixel group is used for constructing a three-dimensional image with a second depth value;
the polarized point light source array includes:
the lateral light source comprises a first light source and a second light source;
the light guide plate is positioned between the first light source and the second light source and comprises a plurality of first light guide points and a plurality of second light guide points which are distributed at intervals on the light incident side of the light guide plate;
sequentially arranging a first polarizing film and a second polarizing film on the light-emitting side of the light guide plate, wherein the first polarizing film comprises a plurality of first polarizing regions, and the second polarizing film comprises a plurality of second polarizing regions;
the orthographic projection of the first polarization region and the second light guide point on the liquid crystal panel is superposed, and the orthographic projection of the second polarization region and the first light guide point on the liquid crystal panel is superposed; the light transmitted from the second polarization region constitutes the first polarization point light source, and the light transmitted from the first polarization region constitutes the second polarization point light source.
2. The display device according to claim 1, further comprising:
the first polarizing region is disposed on a side of the first polarizing film opposite to the second polarizing film;
the second polarizing region is disposed on a side of the second polarizing film opposite to the first polarizing film.
3. A display device according to any one of claims 1-2, characterized in that the display device further comprises:
and a polarizer is arranged on one side of the liquid crystal panel far away from the second polarizing film.
4. The display device according to claim 1, wherein the first light source and the second light source are light emitting diodes.
5. A head-mounted display device characterized in that it comprises a display device as claimed in any one of claims 1 to 4.
6. A method of driving a display device as claimed in any one of claims 1 to 4, the method comprising:
responding to a time sequence control signal, and driving and controlling the first light source and the second light source to work alternately;
when the first light source is controlled to be in an on state at a first moment, driving the second polarization region corresponding to the first light source to be in a polarization modulation on state, and driving the first polarization region to be in a polarization modulation off state;
and responding to the second polarization area being in a polarization modulation starting state, and controlling a first sub-pixel group corresponding to the first polarization point light source on the liquid crystal panel to construct a three-dimensional image with a first depth value.
7. The driving method according to claim 6, characterized by further comprising:
when the second light source is controlled to be in an on state at a second moment, driving a first polarization region corresponding to the second light source to be in a polarization modulation on state, and driving the second polarization region to be in a polarization modulation off state;
and responding to the first polarization area in a polarization modulation starting state, and controlling a second sub-pixel group corresponding to the second polarization point light source on the liquid crystal panel to construct a three-dimensional image with a second depth value.
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| CN112444969B (en) * | 2019-08-30 | 2022-10-18 | 成都理想境界科技有限公司 | Large-view-field double-layer-depth AR waveguide |
| CN111290164A (en) * | 2020-03-31 | 2020-06-16 | 京东方科技集团股份有限公司 | Transparent display panel, display device and glasses |
| CN114815241B (en) * | 2021-12-16 | 2022-12-16 | 北京灵犀微光科技有限公司 | Head-up display system and method and vehicle-mounted system |
| CN115128811B (en) * | 2022-06-20 | 2024-01-12 | 中山大学 | Near-to-eye display module based on orthogonal characteristic pixel blocks |
| CN115903261A (en) * | 2022-07-26 | 2023-04-04 | 华为技术有限公司 | Image generation device, display equipment, vehicle and image generation method |
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